﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net;
using System.IO;

namespace LYMesApi.Util
{
    public class HttpUtils
    {
        public static string Post(string Url, string jsonParas)
        {
            string strURL = Url;
            //创建一个HTTP请求
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(strURL);
            //Post请求方式
            request.Method = "POST";
            //内容类型
            request.ContentType = "application/json";
            //设置参数，并进行URL编码
            string paraUrlCoded = jsonParas;//System.Web.HttpUtility.UrlEncode(jsonParas);
            byte[] payload;
            //将Json字符串转化为字节
            payload = System.Text.Encoding.UTF8.GetBytes(paraUrlCoded);
            //设置请求的ContentLength
            request.ContentLength = payload.Length;
            //发送请求，获得请求流
            Stream writer;
            try
            {
                writer = request.GetRequestStream();//获取用于写入请求数据的Stream对象
            }
            catch (Exception)
            {
                writer = null;
                Console.Write("连接服务器失败!");
            }
            //将请求参数写入流
            writer.Write(payload, 0, payload.Length);
            writer.Close();//关闭请求流
            //  String strValue = "";//strValue为http响应所返回的字符流
            HttpWebResponse response;
            try
            {
                //获得响应流
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream s = response.GetResponseStream();
            //  Stream postData = Request.InputStream;
            StreamReader sRead = new StreamReader(s);
            string postContent = sRead.ReadToEnd();
            sRead.Close();
            return postContent;//返回Json数据
        }

        public static string Get(string Url)
        {
            //创建一个HTTP请求
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            //Post请求方式
            request.Method = "GET";
            //内容类型
            request.ContentType = "application/json";
            HttpWebResponse response;
            try
            {
                //获得响应流
                response = (HttpWebResponse)request.GetResponse();
            }
            catch (WebException ex)
            {
                response = ex.Response as HttpWebResponse;
            }
            Stream s = response.GetResponseStream();
            //  Stream postData = Request.InputStream;
            StreamReader sRead = new StreamReader(s);
            string postContent = sRead.ReadToEnd();
            sRead.Close();
            return postContent;//返回Json数据
        }

        public static string uploadFile(String apiUrl, HeadEntity head)
        {
            string fileNameWithExtension = Path.GetFileName(head.FileName);
            WebClient client = new WebClient();
            client.Proxy = WebRequest.DefaultWebProxy;
            client.Headers.Add("fromappid", head.Formappid);
            client.Headers.Add("toappid", head.Toappid);
            client.Headers.Add("bstype", head.Bstype);
            client.Headers.Add("filename", fileNameWithExtension);
            //client.UploadFileAsync(new Uri(apiUrl), head.FileName);
            byte[] responseArray = client.UploadFile(new Uri(apiUrl), head.FileName);
            string response = System.Text.Encoding.UTF8.GetString(responseArray);
            return response;
        }

        static void DownloadFile(string url, string localPath)
        {
            try
            {
                using (WebClient client = new WebClient())
                {
                    client.DownloadFile(url, localPath);
                    Console.WriteLine("文件已成功下载到： " + localPath);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("下载文件时发生错误： " + ex.Message);
            }
        }
    }
}
